the boiling point of the distilled water was 99°C. After five minutes, the temperature still stayed the same; it remained constant. The liquid was becoming a gas. Phase change means there is an energy change. When the temperature of the water started to increase and energy was added, the particles were starting to move. When the temperature stopped increasing and stayed constant, the particles were overcoming the intermolecular forces. The intermolecular forces were breaking apart. Energy needed to be added to overcome the particle’s motion energy, or kinetic energy.

I'm doing a lab about intermolecular forces and phase changes. We boiled water